9.)Gotye- "Somebody That I Used To Know" 8.)Pitbull- "Back In Time" 7.)Rita Ora- "How We Do" 6.)B.O.B.- "Both Of Us" 5.)Justin Bieber- "Boyfriend" 4.)Demi Lovato- "Give Your Heart A Break" 3.)Carly Rae Jepsen- "Call Me Maybe" 2.)One… more »